Tandem shock-absorbing mechanism



S. B. HASELTINE. TANDEM SHOCK ABsoRBING MECHANISM.

APPLICATION FILED APR. 3. I9I9.

'l NVENTOR. Hafseljze t I facy BY (l, Troie EY G A@ AQ,

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To all whom it may concern:

Be it known that I, STACY B. HAsnL'riNn, a citizen oi Pthe' United States5 residing at Chicago, in the coiinty of Cools and State yoiI illinois, have invented va `certain new and useful lrnovement in Tandern Shock- Absorbing echanisms, of which the following is a full, clear,'concise, and exact debeing had to the aecompanying drawings, forming a part of this speciication.

l his invention relates to improvements in tandem shock absorbing mechanisms.

Since the railroads of the United States have been placed Linder the control ol the United States Railroad Administration, cerhave been adopted for all railroads and among others standards for the draft gears. Under the regulations ol the Railroad Administration, cars must be built with a standard .spacing of 24% between iront land rear setsoi stops `so that these stops will accommodate the ordinal friction gears now on the mar het. he spacing of' 243 -is considerably 'shorter than that heretofore required by standard tandem spring gears and consequently the former types of tandem spring gears vcannot be interchanged with the friction gears emplo ed wi' h the standard spacing of 24 here are numerous railroads in the United States which, rior to the passing ofy control to the IRai-road Administration, had made spring gears standard and which object to the use of friction gears. These roads are still .desirous of employing spring gears but obviously the same must be made so as to be intrchangeable with the friction gears empio ed with the standard spacing of 24% and t ey must also be employed without requirin. any change in the single pocket yokes use with the friction gears.

The objectof my invention is to provide a simple. and inexpensive tandemI gear ar rangement oi the spring type which may be intero-hanged with friction gears now made standard lo the United .idininisration, whicn spring gear wi-il occupy space o" @fiand be usable with single pocket strap.

in the drawing forming part ou? this specification, llignre l is horizontal, sectional view el a portion ol l ilway draft rigging showing in con Specication of Letters letent.

' transverse sectional view ol the arms is satelites oet. is., ifeeo.

Application ined April s, i919. Serial No. senato.

neetion therewith. Fig. 2 is a vertical, n talren substantially-on the line 2-2 of Fig. 1. And Fig. 3

--isa detailed perspective or one oli the lower members .employed with my improve rnen'ts.4

' In said drawing, lil-10 denote channel shaped center or draft sills ot a railway oar to the inner laces ot which are secured iront lugs 11-11 and rear lugs 12-i2 spaced apart the present standard distance of 245;". The draw .bar is indicated at 13 and the same is operatively associated with the shock absorbing mechanism roper by a single pocket yolre strap 1d. All of the inevable .parts are supported by a detachable saddle plate 15.

vIn carrying out my invention, l employ' tandem springs 1.6--16 and two castings A-A. vEach ci the 4castings, A. is of substantially boi: form and has an outer end main walll adapted to act as an end follower, as will be apparent from 'an inspection' of Fig. 1. Each casting A also has a pair of longitudinally extending spaced arms ifi-d8 coni/rooted at their inner ends by a` .transversely extending wall 19, the latter being provided with a narrow integral wall 20 lorming an intermediate follower, as herein-alter" explained. The main end wall '17 corresponds in width and height -to the usual follower and the side arms 18 for a part ol their length correspond in height to the height of the end wall 17. Said arms 18, however, are narrowed at their inner ends as indicated at 21 in Fig. 3

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vso that the narrowed portions 21 of one `me1nber A are adapted to overlap the correspending narrowed vportions o the other member The overlapping arrangement best shown in Fig. 2, the arms oi one member being in section and the other in end elevation. v

TheV narrowed follower sections 20 at the inner ends of the members A. are made so that they will readily dt between the longe tndinally extending l@ oil the other members shown in l. The members A. are connte darts andere assembled one rnernber in the position bestV indi cated by d and other member A side down and fitting thereover. he understood, each spring lo is ci between the niain end wall 17 roher A and the inter oil .crediate iollll@ llli

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lower of the other member A. With this arrangement, upon either inward or outward movement of the draw bar, one of the members A will be held stationary and the other will move relatively toward it so that the springs will be compressed simultaneously, each between a main end wall of one member A and the intermediate follower section of the other member. To prevent over-compression of the springs, shoulders 22 are' formed on each member A in alinement with the inner ends of the arms of the other member A, the shoulders eing so located as to be normally spaced from the arms of the opposite member a distance corresponding to the permissible'compression of the springs. It will be noted that upon full compression, an extremely rigid column of rectangular form is provided 'to absorb the ultimate shocks. Y

As will be understood by those skilled in the art, the various parts of each member A will be substantially braced by ribs and flanges such as indicated, for instance, by F ig. 3. It is not deemed necessary to enter into a detailed description of these strengthening flanges and ribs inasmuch as the same may he varied.

l claim:

l. Iny a tandem shock absorbing mechanism, the combination with two 'follower members, of two shooir absorbing units, each of said meinhers comprising a single casting having an enter end. adapted to act an end follower, pair of inwardly and ily extending arms, and a .narm row follower the i ner ends or said arms, the arms of s members partially oyeiflapM ping t e narrower oilower member litt or between other member, lapping each other, each s enit bearing mi@ 'said narrow followers overabsorbing solely the follower meteor ofA one member and the outer end of the other member. v

2.' ln a tandem draft 'rigging` the combination withdraft sills having front and rear sets of stops, a draw bar, and a single pocket yoke, of a pair of like follower members, and a'pair of tandem arranged springs, each of said follower members being of boxlike form and having a main end vall, integrally spaced' longitudinally extending arms, and an inner integral narrow follower, the arms of said members being pertially overlapped and slidable relatively to each other, the narrow' follower at the inner end of one member sliding between the arms of the other member, each spring bearing entirely upon the narrow follower of one member and the main outer end of the other member. Y

3. In a tandem draftv rigging, the combination with draft sills having front and rear stop-acting means, of a air of castings, andtandem arranged springs, each of said castings being-of substantially hollow box-like form and having a main transversely extending end wall, spaced longitudinally extending side arms, and an inner wall, said side arms being of reduced height at their inner ends and, when assembled, the narrower portions of the side arms of one casting overlying the narrower portions of the arms oi the other casting, the inner wall of each casting being of reduced width for a part of its height and adapted to slide within the arms of the other casting, each soring being interposed between the inner wall one casting andthe main end wall or' the other casting.

witness ll' claim the foregoing li have hereunto subscribed my name this 28th day' of March, lill@ 

